JX92 VTL enclosure with other unit?

hatasa · 2nd September 2006, 04:09 AM

Hi all,

I would like to know is anyone have experience on JX92 VTL transmission line enclosure with other unit, like Fostex or TB?

Thanks!

Colin · 2nd September 2006, 04:03 PM

Have a look at the Caolina Audio site. They've specialisd in the VTL for a while and are using the same basic design with other units. It's basically a Daline TL, so you could adjust line length, line area and chamber volume to match other units.

setting son · 3rd September 2006, 12:38 PM

I have been looking into trying this too - VTL type box with Fostex drivers.

Colin - couldn't find info on the Carolina site other than that with Jordan drivers.

Anyone have any info on design of Daline TLs?

Thanks

Scottmoose · 3rd September 2006, 03:04 PM

http://www.planet10-hifi.com/tom-zHorn.html

hatasa · 3rd September 2006, 05:29 PM

Yes! I am also thinking to use Fostex or TB into the JX92 VTL Box! Just I cant get any info or sharing about this. Anyone can help? Thanks!

Colin · 4th September 2006, 09:01 AM

Dear Setting

Have a look at the 6XL design on the Carolina Audio site - this is a scaled up VTL for a woofer/tweeter arrangement.

There is a PDF of the original 1970s Daline article by Robert Fisk here

setting son · 6th September 2006, 05:41 AM

I have read the Daline article – very interesting indeed. Following this, I did some calculations with winISD and came up with the following for the Fostex FE103E:

Cavity volume 3L
Box tuning frequency 50Hz (?)
Line csa and length to suit box dimensions

According to the results given by winISD the Fostex FE108EΣ should be a straight swap.

Any thoughts?

Many thanks,

Lee

loninappleton · 8th September 2006, 04:23 AM

http://www.fostexinternational.com/d...igma_enc.shtml

The VTL by Fostex in a version for the FE108 sigma. They call it a
Spiral Horn, not to be confused with another 'spiral horn' with a different
internal layrinth in a pvc pipe.

These are a lot more work than a BIB but might fit some environments
better.

Colin · 8th September 2006, 09:16 AM

This one is slightly different in that the line expands to the mouth, presumably to give it a little horn action. The VTL keeps a constant area line and the original Daline tapers towards the mouth. They all use a similar principle, though of using the chamber as a bandpass filter between driver and line.

Scottmoose · 8th September 2006, 01:19 PM

Just make sure you don't try tuning below 0.707Fs or your midbass will start to go AWOL. So the enclosure for a 108 ideally doesn't want to go below ~54.5Hz, and preferably not that low. Remember too that the Sigma is a low excusion driver with an Xmax of 0.28mm, which doesn't give much leeway. They can go further, but distortion will rapidly increase.

2nd September 2006, 04:09 AM	#1
hatasa diyAudio Member Join Date: Oct 2001 Location: Hong Kong	JX92 VTL enclosure with other unit? Hi all, I would like to know is anyone have experience on JX92 VTL transmission line enclosure with other unit, like Fostex or TB? Thanks!

3rd September 2006, 12:38 PM	#3
setting son diyAudio Member Join Date: Jan 2005 Location: North, England	Me too... I have been looking into trying this too - VTL type box with Fostex drivers. Colin - couldn't find info on the Carolina site other than that with Jordan drivers. Anyone have any info on design of Daline TLs? Thanks

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2nd September 2006, 04:03 PM	#2
Colin diyAudio Member Join Date: Aug 2003	Have a look at the Caolina Audio site. They've specialisd in the VTL for a while and are using the same basic design with other units. It's basically a Daline TL, so you could adjust line length, line area and chamber volume to match other units.

3rd September 2006, 03:04 PM	#4
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	http://www.planet10-hifi.com/tom-zHorn.html

3rd September 2006, 05:29 PM	#5
hatasa diyAudio Member Join Date: Oct 2001 Location: Hong Kong	Yes! I am also thinking to use Fostex or TB into the JX92 VTL Box! Just I cant get any info or sharing about this. Anyone can help? Thanks!

4th September 2006, 09:01 AM	#6
Colin diyAudio Member Join Date: Aug 2003	Dear Setting Have a look at the 6XL design on the Carolina Audio site - this is a scaled up VTL for a woofer/tweeter arrangement. There is a PDF of the original 1970s Daline article by Robert Fisk here

6th September 2006, 05:41 AM	#7
setting son diyAudio Member Join Date: Jan 2005 Location: North, England	I have read the Daline article – very interesting indeed. Following this, I did some calculations with winISD and came up with the following for the Fostex FE103E: Cavity volume 3L Box tuning frequency 50Hz (?) Line csa and length to suit box dimensions According to the results given by winISD the Fostex FE108EΣ should be a straight swap. Any thoughts? Many thanks, Lee

8th September 2006, 04:23 AM	#8
loninappleton diyAudio Member Join Date: Feb 2004 Location: Appleton, WI	http://www.fostexinternational.com/d...igma_enc.shtml The VTL by Fostex in a version for the FE108 sigma. They call it a Spiral Horn, not to be confused with another 'spiral horn' with a different internal layrinth in a pvc pipe. These are a lot more work than a BIB but might fit some environments better.

8th September 2006, 09:16 AM	#9
Colin diyAudio Member Join Date: Aug 2003	This one is slightly different in that the line expands to the mouth, presumably to give it a little horn action. The VTL keeps a constant area line and the original Daline tapers towards the mouth. They all use a similar principle, though of using the chamber as a bandpass filter between driver and line.

8th September 2006, 01:19 PM	#10
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Just make sure you don't try tuning below 0.707Fs or your midbass will start to go AWOL. So the enclosure for a 108 ideally doesn't want to go below ~54.5Hz, and preferably not that low. Remember too that the Sigma is a low excusion driver with an Xmax of 0.28mm, which doesn't give much leeway. They can go further, but distortion will rapidly increase.